Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 | 2 | * S/390 common I/O routines -- channel subsystem call |
1da177e4 | 3 | * |
cbc0dd1f | 4 | * Copyright IBM Corp. 1999,2012 |
1da177e4 | 5 | * Author(s): Ingo Adlung (adlung@de.ibm.com) |
4ce3b30c | 6 | * Cornelia Huck (cornelia.huck@de.ibm.com) |
1da177e4 LT |
7 | * Arnd Bergmann (arndb@de.ibm.com) |
8 | */ | |
9 | ||
e6d5a428 ME |
10 | #define KMSG_COMPONENT "cio" |
11 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
12 | ||
1da177e4 | 13 | #include <linux/module.h> |
1da177e4 LT |
14 | #include <linux/slab.h> |
15 | #include <linux/init.h> | |
16 | #include <linux/device.h> | |
9f3d6d7a | 17 | #include <linux/mutex.h> |
cbc0dd1f | 18 | #include <linux/pci.h> |
1da177e4 LT |
19 | |
20 | #include <asm/cio.h> | |
e5854a58 | 21 | #include <asm/chpid.h> |
9d92a7e1 | 22 | #include <asm/chsc.h> |
f5daba1d | 23 | #include <asm/crw.h> |
ca4ba153 | 24 | #include <asm/isc.h> |
1d2334cb | 25 | #include <asm/ebcdic.h> |
1da177e4 LT |
26 | |
27 | #include "css.h" | |
28 | #include "cio.h" | |
29 | #include "cio_debug.h" | |
30 | #include "ioasm.h" | |
e6b6e10a | 31 | #include "chp.h" |
1da177e4 LT |
32 | #include "chsc.h" |
33 | ||
1da177e4 | 34 | static void *sei_page; |
34196f82 SO |
35 | static void *chsc_page; |
36 | static DEFINE_SPINLOCK(chsc_page_lock); | |
1da177e4 | 37 | |
dae39843 CH |
38 | /** |
39 | * chsc_error_from_response() - convert a chsc response to an error | |
40 | * @response: chsc response code | |
41 | * | |
42 | * Returns an appropriate Linux error code for @response. | |
43 | */ | |
44 | int chsc_error_from_response(int response) | |
b9c9a21a CH |
45 | { |
46 | switch (response) { | |
47 | case 0x0001: | |
48 | return 0; | |
49 | case 0x0002: | |
50 | case 0x0003: | |
51 | case 0x0006: | |
52 | case 0x0007: | |
53 | case 0x0008: | |
54 | case 0x000a: | |
fd0457a6 | 55 | case 0x0104: |
b9c9a21a CH |
56 | return -EINVAL; |
57 | case 0x0004: | |
58 | return -EOPNOTSUPP; | |
184b08af | 59 | case 0x000b: |
1c59a861 | 60 | case 0x0107: /* "Channel busy" for the op 0x003d */ |
184b08af SO |
61 | return -EBUSY; |
62 | case 0x0100: | |
63 | case 0x0102: | |
64 | return -ENOMEM; | |
b9c9a21a CH |
65 | default: |
66 | return -EIO; | |
67 | } | |
68 | } | |
dae39843 | 69 | EXPORT_SYMBOL_GPL(chsc_error_from_response); |
b9c9a21a | 70 | |
7ad6a249 PO |
71 | struct chsc_ssd_area { |
72 | struct chsc_header request; | |
73 | u16 :10; | |
74 | u16 ssid:2; | |
75 | u16 :4; | |
76 | u16 f_sch; /* first subchannel */ | |
77 | u16 :16; | |
78 | u16 l_sch; /* last subchannel */ | |
79 | u32 :32; | |
80 | struct chsc_header response; | |
81 | u32 :32; | |
82 | u8 sch_valid : 1; | |
83 | u8 dev_valid : 1; | |
84 | u8 st : 3; /* subchannel type */ | |
85 | u8 zeroes : 3; | |
86 | u8 unit_addr; /* unit address */ | |
87 | u16 devno; /* device number */ | |
88 | u8 path_mask; | |
89 | u8 fla_valid_mask; | |
90 | u16 sch; /* subchannel */ | |
91 | u8 chpid[8]; /* chpids 0-7 */ | |
92 | u16 fla[8]; /* full link addresses 0-7 */ | |
93 | } __attribute__ ((packed)); | |
94 | ||
95 | int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd) | |
1da177e4 | 96 | { |
7ad6a249 | 97 | struct chsc_ssd_area *ssd_area; |
d53c51f2 | 98 | unsigned long flags; |
7ad6a249 PO |
99 | int ccode; |
100 | int ret; | |
101 | int i; | |
102 | int mask; | |
1da177e4 | 103 | |
d53c51f2 | 104 | spin_lock_irqsave(&chsc_page_lock, flags); |
34196f82 SO |
105 | memset(chsc_page, 0, PAGE_SIZE); |
106 | ssd_area = chsc_page; | |
495a5b45 CH |
107 | ssd_area->request.length = 0x0010; |
108 | ssd_area->request.code = 0x0004; | |
7ad6a249 PO |
109 | ssd_area->ssid = schid.ssid; |
110 | ssd_area->f_sch = schid.sch_no; | |
111 | ssd_area->l_sch = schid.sch_no; | |
1da177e4 LT |
112 | |
113 | ccode = chsc(ssd_area); | |
7ad6a249 | 114 | /* Check response. */ |
1da177e4 | 115 | if (ccode > 0) { |
7ad6a249 | 116 | ret = (ccode == 3) ? -ENODEV : -EBUSY; |
34196f82 | 117 | goto out; |
1da177e4 | 118 | } |
b9c9a21a CH |
119 | ret = chsc_error_from_response(ssd_area->response.code); |
120 | if (ret != 0) { | |
7ad6a249 PO |
121 | CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n", |
122 | schid.ssid, schid.sch_no, | |
1da177e4 | 123 | ssd_area->response.code); |
34196f82 | 124 | goto out; |
1da177e4 | 125 | } |
7ad6a249 PO |
126 | if (!ssd_area->sch_valid) { |
127 | ret = -ENODEV; | |
34196f82 | 128 | goto out; |
1da177e4 | 129 | } |
7ad6a249 PO |
130 | /* Copy data */ |
131 | ret = 0; | |
132 | memset(ssd, 0, sizeof(struct chsc_ssd_info)); | |
b279a4f5 CH |
133 | if ((ssd_area->st != SUBCHANNEL_TYPE_IO) && |
134 | (ssd_area->st != SUBCHANNEL_TYPE_MSG)) | |
34196f82 | 135 | goto out; |
7ad6a249 PO |
136 | ssd->path_mask = ssd_area->path_mask; |
137 | ssd->fla_valid_mask = ssd_area->fla_valid_mask; | |
138 | for (i = 0; i < 8; i++) { | |
139 | mask = 0x80 >> i; | |
140 | if (ssd_area->path_mask & mask) { | |
141 | chp_id_init(&ssd->chpid[i]); | |
142 | ssd->chpid[i].id = ssd_area->chpid[i]; | |
1da177e4 | 143 | } |
7ad6a249 PO |
144 | if (ssd_area->fla_valid_mask & mask) |
145 | ssd->fla[i] = ssd_area->fla[i]; | |
1da177e4 | 146 | } |
34196f82 | 147 | out: |
d53c51f2 | 148 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
1da177e4 LT |
149 | return ret; |
150 | } | |
151 | ||
da5b6cb1 SO |
152 | /** |
153 | * chsc_ssqd() - store subchannel QDIO data (SSQD) | |
154 | * @schid: id of the subchannel on which SSQD is performed | |
155 | * @ssqd: request and response block for SSQD | |
156 | * | |
157 | * Returns 0 on success. | |
158 | */ | |
159 | int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd) | |
160 | { | |
161 | memset(ssqd, 0, sizeof(*ssqd)); | |
162 | ssqd->request.length = 0x0010; | |
163 | ssqd->request.code = 0x0024; | |
164 | ssqd->first_sch = schid.sch_no; | |
165 | ssqd->last_sch = schid.sch_no; | |
166 | ssqd->ssid = schid.ssid; | |
167 | ||
168 | if (chsc(ssqd)) | |
169 | return -EIO; | |
170 | ||
171 | return chsc_error_from_response(ssqd->response.code); | |
172 | } | |
173 | EXPORT_SYMBOL_GPL(chsc_ssqd); | |
174 | ||
ca4ba153 SO |
175 | /** |
176 | * chsc_sadc() - set adapter device controls (SADC) | |
177 | * @schid: id of the subchannel on which SADC is performed | |
178 | * @scssc: request and response block for SADC | |
179 | * @summary_indicator_addr: summary indicator address | |
180 | * @subchannel_indicator_addr: subchannel indicator address | |
181 | * | |
182 | * Returns 0 on success. | |
183 | */ | |
184 | int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc, | |
185 | u64 summary_indicator_addr, u64 subchannel_indicator_addr) | |
186 | { | |
187 | memset(scssc, 0, sizeof(*scssc)); | |
188 | scssc->request.length = 0x0fe0; | |
189 | scssc->request.code = 0x0021; | |
190 | scssc->operation_code = 0; | |
191 | ||
192 | scssc->summary_indicator_addr = summary_indicator_addr; | |
193 | scssc->subchannel_indicator_addr = subchannel_indicator_addr; | |
194 | ||
195 | scssc->ks = PAGE_DEFAULT_KEY >> 4; | |
196 | scssc->kc = PAGE_DEFAULT_KEY >> 4; | |
197 | scssc->isc = QDIO_AIRQ_ISC; | |
198 | scssc->schid = schid; | |
199 | ||
200 | /* enable the time delay disablement facility */ | |
201 | if (css_general_characteristics.aif_tdd) | |
202 | scssc->word_with_d_bit = 0x10000000; | |
203 | ||
204 | if (chsc(scssc)) | |
205 | return -EIO; | |
206 | ||
207 | return chsc_error_from_response(scssc->response.code); | |
208 | } | |
209 | EXPORT_SYMBOL_GPL(chsc_sadc); | |
210 | ||
e82a1567 | 211 | static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data) |
1da177e4 | 212 | { |
2ec22984 | 213 | spin_lock_irq(sch->lock); |
c820de39 CH |
214 | if (sch->driver && sch->driver->chp_event) |
215 | if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0) | |
1da177e4 | 216 | goto out_unreg; |
2ec22984 | 217 | spin_unlock_irq(sch->lock); |
1da177e4 | 218 | return 0; |
387b734f | 219 | |
1da177e4 | 220 | out_unreg: |
1da177e4 | 221 | sch->lpm = 0; |
387b734f | 222 | spin_unlock_irq(sch->lock); |
83b3370c | 223 | css_schedule_eval(sch->schid); |
1da177e4 LT |
224 | return 0; |
225 | } | |
226 | ||
e6b6e10a | 227 | void chsc_chp_offline(struct chp_id chpid) |
1da177e4 | 228 | { |
9f3d6d7a | 229 | struct channel_path *chp = chpid_to_chp(chpid); |
99611f87 | 230 | struct chp_link link; |
9f3d6d7a | 231 | char dbf_txt[15]; |
1da177e4 | 232 | |
f86635fa | 233 | sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
234 | CIO_TRACE_EVENT(2, dbf_txt); |
235 | ||
e6b6e10a | 236 | if (chp_get_status(chpid) <= 0) |
1da177e4 | 237 | return; |
99611f87 CH |
238 | memset(&link, 0, sizeof(struct chp_link)); |
239 | link.chpid = chpid; | |
22806dc1 CH |
240 | /* Wait until previous actions have settled. */ |
241 | css_wait_for_slow_path(); | |
9f3d6d7a SO |
242 | |
243 | mutex_lock(&chp->lock); | |
244 | chp_update_desc(chp); | |
245 | mutex_unlock(&chp->lock); | |
246 | ||
99611f87 | 247 | for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link); |
1da177e4 LT |
248 | } |
249 | ||
e82a1567 | 250 | static int __s390_process_res_acc(struct subchannel *sch, void *data) |
1da177e4 | 251 | { |
2ec22984 | 252 | spin_lock_irq(sch->lock); |
c820de39 CH |
253 | if (sch->driver && sch->driver->chp_event) |
254 | sch->driver->chp_event(sch, data, CHP_ONLINE); | |
2ec22984 | 255 | spin_unlock_irq(sch->lock); |
e82a1567 | 256 | |
dd9963f9 | 257 | return 0; |
f97a56fb CH |
258 | } |
259 | ||
99611f87 | 260 | static void s390_process_res_acc(struct chp_link *link) |
f97a56fb | 261 | { |
1da177e4 LT |
262 | char dbf_txt[15]; |
263 | ||
99611f87 CH |
264 | sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid, |
265 | link->chpid.id); | |
1da177e4 | 266 | CIO_TRACE_EVENT( 2, dbf_txt); |
99611f87 CH |
267 | if (link->fla != 0) { |
268 | sprintf(dbf_txt, "fla%x", link->fla); | |
1da177e4 LT |
269 | CIO_TRACE_EVENT( 2, dbf_txt); |
270 | } | |
22806dc1 CH |
271 | /* Wait until previous actions have settled. */ |
272 | css_wait_for_slow_path(); | |
1da177e4 LT |
273 | /* |
274 | * I/O resources may have become accessible. | |
275 | * Scan through all subchannels that may be concerned and | |
276 | * do a validation on those. | |
277 | * The more information we have (info), the less scanning | |
278 | * will we have to do. | |
279 | */ | |
449666dd PO |
280 | for_each_subchannel_staged(__s390_process_res_acc, NULL, link); |
281 | css_schedule_reprobe(); | |
1da177e4 LT |
282 | } |
283 | ||
cbc0dd1f JG |
284 | struct chsc_sei_nt0_area { |
285 | u8 flags; | |
286 | u8 vf; /* validity flags */ | |
287 | u8 rs; /* reporting source */ | |
288 | u8 cc; /* content code */ | |
289 | u16 fla; /* full link address */ | |
290 | u16 rsid; /* reporting source id */ | |
184357a5 PO |
291 | u32 reserved1; |
292 | u32 reserved2; | |
184357a5 | 293 | /* ccdf has to be big enough for a link-incident record */ |
cbc0dd1f JG |
294 | u8 ccdf[PAGE_SIZE - 24 - 16]; /* content-code dependent field */ |
295 | } __packed; | |
296 | ||
297 | struct chsc_sei_nt2_area { | |
298 | u8 flags; /* p and v bit */ | |
299 | u8 reserved1; | |
300 | u8 reserved2; | |
301 | u8 cc; /* content code */ | |
302 | u32 reserved3[13]; | |
303 | u8 ccdf[PAGE_SIZE - 24 - 56]; /* content-code dependent field */ | |
304 | } __packed; | |
305 | ||
509d97b6 | 306 | #define CHSC_SEI_NT0 (1ULL << 63) |
cbc0dd1f JG |
307 | #define CHSC_SEI_NT2 (1ULL << 61) |
308 | ||
309 | struct chsc_sei { | |
310 | struct chsc_header request; | |
311 | u32 reserved1; | |
312 | u64 ntsm; /* notification type mask */ | |
313 | struct chsc_header response; | |
509d97b6 SO |
314 | u32 :24; |
315 | u8 nt; | |
cbc0dd1f JG |
316 | union { |
317 | struct chsc_sei_nt0_area nt0_area; | |
318 | struct chsc_sei_nt2_area nt2_area; | |
319 | u8 nt_area[PAGE_SIZE - 24]; | |
320 | } u; | |
321 | } __packed; | |
322 | ||
1d2334cb PO |
323 | /* |
324 | * Node Descriptor as defined in SA22-7204, "Common I/O-Device Commands" | |
325 | */ | |
326 | ||
327 | #define ND_VALIDITY_VALID 0 | |
328 | #define ND_VALIDITY_OUTDATED 1 | |
329 | #define ND_VALIDITY_INVALID 2 | |
330 | ||
331 | struct node_descriptor { | |
332 | /* Flags. */ | |
333 | union { | |
334 | struct { | |
335 | u32 validity:3; | |
336 | u32 reserved:5; | |
337 | } __packed; | |
338 | u8 byte0; | |
339 | } __packed; | |
340 | ||
341 | /* Node parameters. */ | |
342 | u32 params:24; | |
343 | ||
344 | /* Node ID. */ | |
345 | char type[6]; | |
346 | char model[3]; | |
347 | char manufacturer[3]; | |
348 | char plant[2]; | |
349 | char seq[12]; | |
350 | u16 tag; | |
351 | } __packed; | |
352 | ||
353 | /* | |
354 | * Link Incident Record as defined in SA22-7202, "ESCON I/O Interface" | |
355 | */ | |
356 | ||
357 | #define LIR_IQ_CLASS_INFO 0 | |
358 | #define LIR_IQ_CLASS_DEGRADED 1 | |
359 | #define LIR_IQ_CLASS_NOT_OPERATIONAL 2 | |
360 | ||
361 | struct lir { | |
362 | struct { | |
363 | u32 null:1; | |
364 | u32 reserved:3; | |
365 | u32 class:2; | |
366 | u32 reserved2:2; | |
367 | } __packed iq; | |
368 | u32 ic:8; | |
369 | u32 reserved:16; | |
370 | struct node_descriptor incident_node; | |
371 | struct node_descriptor attached_node; | |
372 | u8 reserved2[32]; | |
373 | } __packed; | |
374 | ||
375 | #define PARAMS_LEN 10 /* PARAMS=xx,xxxxxx */ | |
376 | #define NODEID_LEN 35 /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */ | |
377 | ||
378 | /* Copy EBCIDC text, convert to ASCII and optionally add delimiter. */ | |
379 | static char *store_ebcdic(char *dest, const char *src, unsigned long len, | |
380 | char delim) | |
381 | { | |
382 | memcpy(dest, src, len); | |
383 | EBCASC(dest, len); | |
384 | ||
385 | if (delim) | |
386 | dest[len++] = delim; | |
387 | ||
388 | return dest + len; | |
389 | } | |
390 | ||
391 | /* Format node ID and parameters for output in LIR log message. */ | |
392 | static void format_node_data(char *params, char *id, struct node_descriptor *nd) | |
393 | { | |
394 | memset(params, 0, PARAMS_LEN); | |
395 | memset(id, 0, NODEID_LEN); | |
396 | ||
397 | if (nd->validity != ND_VALIDITY_VALID) { | |
398 | strncpy(params, "n/a", PARAMS_LEN - 1); | |
399 | strncpy(id, "n/a", NODEID_LEN - 1); | |
400 | return; | |
401 | } | |
402 | ||
403 | /* PARAMS=xx,xxxxxx */ | |
404 | snprintf(params, PARAMS_LEN, "%02x,%06x", nd->byte0, nd->params); | |
405 | /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */ | |
406 | id = store_ebcdic(id, nd->type, sizeof(nd->type), '/'); | |
407 | id = store_ebcdic(id, nd->model, sizeof(nd->model), ','); | |
408 | id = store_ebcdic(id, nd->manufacturer, sizeof(nd->manufacturer), '.'); | |
409 | id = store_ebcdic(id, nd->plant, sizeof(nd->plant), 0); | |
410 | id = store_ebcdic(id, nd->seq, sizeof(nd->seq), ','); | |
411 | sprintf(id, "%04X", nd->tag); | |
412 | } | |
413 | ||
cbc0dd1f | 414 | static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area) |
184357a5 | 415 | { |
1d2334cb PO |
416 | struct lir *lir = (struct lir *) &sei_area->ccdf; |
417 | char iuparams[PARAMS_LEN], iunodeid[NODEID_LEN], auparams[PARAMS_LEN], | |
418 | aunodeid[NODEID_LEN]; | |
184357a5 | 419 | |
1d2334cb PO |
420 | CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x, iq=%02x)\n", |
421 | sei_area->rs, sei_area->rsid, sei_area->ccdf[0]); | |
422 | ||
423 | /* Ignore NULL Link Incident Records. */ | |
424 | if (lir->iq.null) | |
83b3370c | 425 | return; |
1d2334cb PO |
426 | |
427 | /* Inform user that a link requires maintenance actions because it has | |
428 | * become degraded or not operational. Note that this log message is | |
429 | * the primary intention behind a Link Incident Record. */ | |
430 | ||
431 | format_node_data(iuparams, iunodeid, &lir->incident_node); | |
432 | format_node_data(auparams, aunodeid, &lir->attached_node); | |
433 | ||
434 | switch (lir->iq.class) { | |
435 | case LIR_IQ_CLASS_DEGRADED: | |
436 | pr_warn("Link degraded: RS=%02x RSID=%04x IC=%02x " | |
437 | "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n", | |
438 | sei_area->rs, sei_area->rsid, lir->ic, iuparams, | |
439 | iunodeid, auparams, aunodeid); | |
440 | break; | |
441 | case LIR_IQ_CLASS_NOT_OPERATIONAL: | |
442 | pr_err("Link stopped: RS=%02x RSID=%04x IC=%02x " | |
443 | "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n", | |
444 | sei_area->rs, sei_area->rsid, lir->ic, iuparams, | |
445 | iunodeid, auparams, aunodeid); | |
446 | break; | |
447 | default: | |
448 | break; | |
f86635fa | 449 | } |
184357a5 PO |
450 | } |
451 | ||
cbc0dd1f | 452 | static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area) |
1da177e4 | 453 | { |
99611f87 | 454 | struct chp_link link; |
f86635fa | 455 | struct chp_id chpid; |
184357a5 | 456 | int status; |
184357a5 PO |
457 | |
458 | CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, " | |
459 | "rs_id=%04x)\n", sei_area->rs, sei_area->rsid); | |
460 | if (sei_area->rs != 4) | |
83b3370c | 461 | return; |
f86635fa PO |
462 | chp_id_init(&chpid); |
463 | chpid.id = sei_area->rsid; | |
184357a5 | 464 | /* allocate a new channel path structure, if needed */ |
e6b6e10a | 465 | status = chp_get_status(chpid); |
184357a5 | 466 | if (status < 0) |
e6b6e10a | 467 | chp_new(chpid); |
184357a5 | 468 | else if (!status) |
83b3370c | 469 | return; |
99611f87 CH |
470 | memset(&link, 0, sizeof(struct chp_link)); |
471 | link.chpid = chpid; | |
184357a5 | 472 | if ((sei_area->vf & 0xc0) != 0) { |
99611f87 | 473 | link.fla = sei_area->fla; |
184357a5 PO |
474 | if ((sei_area->vf & 0xc0) == 0xc0) |
475 | /* full link address */ | |
99611f87 | 476 | link.fla_mask = 0xffff; |
184357a5 PO |
477 | else |
478 | /* link address */ | |
99611f87 | 479 | link.fla_mask = 0xff00; |
184357a5 | 480 | } |
99611f87 | 481 | s390_process_res_acc(&link); |
184357a5 PO |
482 | } |
483 | ||
cbc0dd1f | 484 | static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area) |
fca894ed SO |
485 | { |
486 | struct channel_path *chp; | |
487 | struct chp_id chpid; | |
488 | u8 *data; | |
489 | int num; | |
490 | ||
491 | CIO_CRW_EVENT(4, "chsc: channel path availability information\n"); | |
492 | if (sei_area->rs != 0) | |
493 | return; | |
494 | data = sei_area->ccdf; | |
495 | chp_id_init(&chpid); | |
496 | for (num = 0; num <= __MAX_CHPID; num++) { | |
497 | if (!chp_test_bit(data, num)) | |
498 | continue; | |
499 | chpid.id = num; | |
500 | ||
501 | CIO_CRW_EVENT(4, "Update information for channel path " | |
502 | "%x.%02x\n", chpid.cssid, chpid.id); | |
503 | chp = chpid_to_chp(chpid); | |
504 | if (!chp) { | |
505 | chp_new(chpid); | |
506 | continue; | |
507 | } | |
508 | mutex_lock(&chp->lock); | |
cce0eacc | 509 | chp_update_desc(chp); |
fca894ed SO |
510 | mutex_unlock(&chp->lock); |
511 | } | |
512 | } | |
513 | ||
e5854a58 PO |
514 | struct chp_config_data { |
515 | u8 map[32]; | |
516 | u8 op; | |
517 | u8 pc; | |
518 | }; | |
519 | ||
cbc0dd1f | 520 | static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area) |
e5854a58 PO |
521 | { |
522 | struct chp_config_data *data; | |
523 | struct chp_id chpid; | |
524 | int num; | |
e6d5a428 | 525 | char *events[3] = {"configure", "deconfigure", "cancel deconfigure"}; |
e5854a58 PO |
526 | |
527 | CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n"); | |
528 | if (sei_area->rs != 0) | |
83b3370c | 529 | return; |
e5854a58 PO |
530 | data = (struct chp_config_data *) &(sei_area->ccdf); |
531 | chp_id_init(&chpid); | |
532 | for (num = 0; num <= __MAX_CHPID; num++) { | |
533 | if (!chp_test_bit(data->map, num)) | |
534 | continue; | |
535 | chpid.id = num; | |
e6d5a428 ME |
536 | pr_notice("Processing %s for channel path %x.%02x\n", |
537 | events[data->op], chpid.cssid, chpid.id); | |
e5854a58 PO |
538 | switch (data->op) { |
539 | case 0: | |
540 | chp_cfg_schedule(chpid, 1); | |
541 | break; | |
542 | case 1: | |
543 | chp_cfg_schedule(chpid, 0); | |
544 | break; | |
545 | case 2: | |
546 | chp_cfg_cancel_deconfigure(chpid); | |
547 | break; | |
548 | } | |
549 | } | |
e5854a58 PO |
550 | } |
551 | ||
cbc0dd1f | 552 | static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area) |
40ff4cc0 SO |
553 | { |
554 | int ret; | |
555 | ||
556 | CIO_CRW_EVENT(4, "chsc: scm change notification\n"); | |
557 | if (sei_area->rs != 7) | |
558 | return; | |
559 | ||
560 | ret = scm_update_information(); | |
561 | if (ret) | |
562 | CIO_CRW_EVENT(0, "chsc: updating change notification" | |
563 | " failed (rc=%d).\n", ret); | |
564 | } | |
565 | ||
aebfa669 SO |
566 | static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area) |
567 | { | |
568 | int ret; | |
569 | ||
570 | CIO_CRW_EVENT(4, "chsc: scm available information\n"); | |
571 | if (sei_area->rs != 7) | |
572 | return; | |
573 | ||
574 | ret = scm_process_availability_information(); | |
575 | if (ret) | |
576 | CIO_CRW_EVENT(0, "chsc: process availability information" | |
577 | " failed (rc=%d).\n", ret); | |
578 | } | |
579 | ||
cbc0dd1f | 580 | static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area) |
184357a5 | 581 | { |
cbc0dd1f JG |
582 | switch (sei_area->cc) { |
583 | case 1: | |
584 | zpci_event_error(sei_area->ccdf); | |
585 | break; | |
586 | case 2: | |
587 | zpci_event_availability(sei_area->ccdf); | |
588 | break; | |
589 | default: | |
9a17e972 | 590 | CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n", |
cbc0dd1f JG |
591 | sei_area->cc); |
592 | break; | |
83b3370c | 593 | } |
cbc0dd1f JG |
594 | } |
595 | ||
596 | static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area) | |
597 | { | |
184357a5 | 598 | /* which kind of information was stored? */ |
184357a5 PO |
599 | switch (sei_area->cc) { |
600 | case 1: /* link incident*/ | |
83b3370c | 601 | chsc_process_sei_link_incident(sei_area); |
184357a5 | 602 | break; |
fca894ed | 603 | case 2: /* i/o resource accessibility */ |
83b3370c | 604 | chsc_process_sei_res_acc(sei_area); |
184357a5 | 605 | break; |
fca894ed SO |
606 | case 7: /* channel-path-availability information */ |
607 | chsc_process_sei_chp_avail(sei_area); | |
608 | break; | |
e5854a58 | 609 | case 8: /* channel-path-configuration notification */ |
83b3370c | 610 | chsc_process_sei_chp_config(sei_area); |
e5854a58 | 611 | break; |
40ff4cc0 SO |
612 | case 12: /* scm change notification */ |
613 | chsc_process_sei_scm_change(sei_area); | |
614 | break; | |
aebfa669 SO |
615 | case 14: /* scm available notification */ |
616 | chsc_process_sei_scm_avail(sei_area); | |
617 | break; | |
184357a5 | 618 | default: /* other stuff */ |
9a17e972 | 619 | CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n", |
184357a5 PO |
620 | sei_area->cc); |
621 | break; | |
622 | } | |
9a17e972 SO |
623 | |
624 | /* Check if we might have lost some information. */ | |
625 | if (sei_area->flags & 0x40) { | |
626 | CIO_CRW_EVENT(2, "chsc: event overflow\n"); | |
627 | css_schedule_eval_all(); | |
628 | } | |
184357a5 PO |
629 | } |
630 | ||
9a17e972 | 631 | static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm) |
cbc0dd1f | 632 | { |
06cd7a87 SO |
633 | static int ntsm_unsupported; |
634 | ||
635 | while (true) { | |
cbc0dd1f JG |
636 | memset(sei, 0, sizeof(*sei)); |
637 | sei->request.length = 0x0010; | |
638 | sei->request.code = 0x000e; | |
06cd7a87 SO |
639 | if (!ntsm_unsupported) |
640 | sei->ntsm = ntsm; | |
cbc0dd1f JG |
641 | |
642 | if (chsc(sei)) | |
643 | break; | |
644 | ||
9a17e972 | 645 | if (sei->response.code != 0x0001) { |
06cd7a87 SO |
646 | CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x, ntsm=%llx)\n", |
647 | sei->response.code, sei->ntsm); | |
648 | ||
649 | if (sei->response.code == 3 && sei->ntsm) { | |
650 | /* Fallback for old firmware. */ | |
651 | ntsm_unsupported = 1; | |
652 | continue; | |
653 | } | |
cbc0dd1f JG |
654 | break; |
655 | } | |
cbc0dd1f | 656 | |
9a17e972 SO |
657 | CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt); |
658 | switch (sei->nt) { | |
659 | case 0: | |
660 | chsc_process_sei_nt0(&sei->u.nt0_area); | |
661 | break; | |
662 | case 2: | |
663 | chsc_process_sei_nt2(&sei->u.nt2_area); | |
664 | break; | |
665 | default: | |
666 | CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt); | |
667 | break; | |
668 | } | |
06cd7a87 SO |
669 | |
670 | if (!(sei->u.nt0_area.flags & 0x80)) | |
671 | break; | |
672 | } | |
cbc0dd1f JG |
673 | } |
674 | ||
9a17e972 SO |
675 | /* |
676 | * Handle channel subsystem related CRWs. | |
677 | * Use store event information to find out what's going on. | |
678 | * | |
679 | * Note: Access to sei_page is serialized through machine check handler | |
680 | * thread, so no need for locking. | |
681 | */ | |
c1156189 | 682 | static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow) |
184357a5 | 683 | { |
9a17e972 | 684 | struct chsc_sei *sei = sei_page; |
1da177e4 | 685 | |
c1156189 CH |
686 | if (overflow) { |
687 | css_schedule_eval_all(); | |
688 | return; | |
689 | } | |
690 | CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, " | |
691 | "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", | |
692 | crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc, | |
693 | crw0->erc, crw0->rsid); | |
1da177e4 | 694 | |
c1156189 | 695 | CIO_TRACE_EVENT(2, "prcss"); |
9a17e972 | 696 | chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2); |
1da177e4 LT |
697 | } |
698 | ||
83b3370c | 699 | void chsc_chp_online(struct chp_id chpid) |
f97a56fb | 700 | { |
9f3d6d7a | 701 | struct channel_path *chp = chpid_to_chp(chpid); |
99611f87 | 702 | struct chp_link link; |
9f3d6d7a | 703 | char dbf_txt[15]; |
1da177e4 | 704 | |
f86635fa | 705 | sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); |
1da177e4 LT |
706 | CIO_TRACE_EVENT(2, dbf_txt); |
707 | ||
22806dc1 | 708 | if (chp_get_status(chpid) != 0) { |
99611f87 CH |
709 | memset(&link, 0, sizeof(struct chp_link)); |
710 | link.chpid = chpid; | |
22806dc1 CH |
711 | /* Wait until previous actions have settled. */ |
712 | css_wait_for_slow_path(); | |
9f3d6d7a SO |
713 | |
714 | mutex_lock(&chp->lock); | |
715 | chp_update_desc(chp); | |
716 | mutex_unlock(&chp->lock); | |
717 | ||
c820de39 | 718 | for_each_subchannel_staged(__s390_process_res_acc, NULL, |
99611f87 | 719 | &link); |
9955e8d1 | 720 | css_schedule_reprobe(); |
22806dc1 | 721 | } |
1da177e4 LT |
722 | } |
723 | ||
f86635fa PO |
724 | static void __s390_subchannel_vary_chpid(struct subchannel *sch, |
725 | struct chp_id chpid, int on) | |
1da177e4 | 726 | { |
1da177e4 | 727 | unsigned long flags; |
99611f87 | 728 | struct chp_link link; |
1da177e4 | 729 | |
99611f87 CH |
730 | memset(&link, 0, sizeof(struct chp_link)); |
731 | link.chpid = chpid; | |
2ec22984 | 732 | spin_lock_irqsave(sch->lock, flags); |
c820de39 | 733 | if (sch->driver && sch->driver->chp_event) |
99611f87 | 734 | sch->driver->chp_event(sch, &link, |
c820de39 | 735 | on ? CHP_VARY_ON : CHP_VARY_OFF); |
2ec22984 | 736 | spin_unlock_irqrestore(sch->lock, flags); |
1da177e4 LT |
737 | } |
738 | ||
e82a1567 | 739 | static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data) |
1da177e4 | 740 | { |
e82a1567 | 741 | struct chp_id *chpid = data; |
1da177e4 LT |
742 | |
743 | __s390_subchannel_vary_chpid(sch, *chpid, 0); | |
744 | return 0; | |
745 | } | |
746 | ||
e82a1567 | 747 | static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data) |
1da177e4 | 748 | { |
e82a1567 | 749 | struct chp_id *chpid = data; |
1da177e4 LT |
750 | |
751 | __s390_subchannel_vary_chpid(sch, *chpid, 1); | |
752 | return 0; | |
753 | } | |
754 | ||
e6b6e10a PO |
755 | /** |
756 | * chsc_chp_vary - propagate channel-path vary operation to subchannels | |
757 | * @chpid: channl-path ID | |
758 | * @on: non-zero for vary online, zero for vary offline | |
1da177e4 | 759 | */ |
e6b6e10a | 760 | int chsc_chp_vary(struct chp_id chpid, int on) |
1da177e4 | 761 | { |
c38a90a3 | 762 | struct channel_path *chp = chpid_to_chp(chpid); |
99611f87 | 763 | |
22806dc1 CH |
764 | /* Wait until previous actions have settled. */ |
765 | css_wait_for_slow_path(); | |
1da177e4 LT |
766 | /* |
767 | * Redo PathVerification on the devices the chpid connects to | |
768 | */ | |
c38a90a3 | 769 | if (on) { |
cce0eacc PO |
770 | /* Try to update the channel path description. */ |
771 | chp_update_desc(chp); | |
e82a1567 | 772 | for_each_subchannel_staged(s390_subchannel_vary_chpid_on, |
449666dd PO |
773 | NULL, &chpid); |
774 | css_schedule_reprobe(); | |
c38a90a3 | 775 | } else |
e82a1567 | 776 | for_each_subchannel_staged(s390_subchannel_vary_chpid_off, |
3b484ec6 | 777 | NULL, &chpid); |
e82a1567 | 778 | |
1da177e4 LT |
779 | return 0; |
780 | } | |
781 | ||
495a5b45 CH |
782 | static void |
783 | chsc_remove_cmg_attr(struct channel_subsystem *css) | |
784 | { | |
785 | int i; | |
786 | ||
787 | for (i = 0; i <= __MAX_CHPID; i++) { | |
788 | if (!css->chps[i]) | |
789 | continue; | |
e6b6e10a | 790 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
791 | } |
792 | } | |
793 | ||
794 | static int | |
795 | chsc_add_cmg_attr(struct channel_subsystem *css) | |
796 | { | |
797 | int i, ret; | |
798 | ||
799 | ret = 0; | |
800 | for (i = 0; i <= __MAX_CHPID; i++) { | |
801 | if (!css->chps[i]) | |
802 | continue; | |
e6b6e10a | 803 | ret = chp_add_cmg_attr(css->chps[i]); |
495a5b45 CH |
804 | if (ret) |
805 | goto cleanup; | |
806 | } | |
807 | return ret; | |
808 | cleanup: | |
809 | for (--i; i >= 0; i--) { | |
810 | if (!css->chps[i]) | |
811 | continue; | |
e6b6e10a | 812 | chp_remove_cmg_attr(css->chps[i]); |
495a5b45 CH |
813 | } |
814 | return ret; | |
815 | } | |
816 | ||
34196f82 | 817 | int __chsc_do_secm(struct channel_subsystem *css, int enable) |
495a5b45 CH |
818 | { |
819 | struct { | |
820 | struct chsc_header request; | |
821 | u32 operation_code : 2; | |
822 | u32 : 30; | |
823 | u32 key : 4; | |
824 | u32 : 28; | |
825 | u32 zeroes1; | |
826 | u32 cub_addr1; | |
827 | u32 zeroes2; | |
828 | u32 cub_addr2; | |
829 | u32 reserved[13]; | |
830 | struct chsc_header response; | |
831 | u32 status : 8; | |
832 | u32 : 4; | |
833 | u32 fmt : 4; | |
834 | u32 : 16; | |
0f008aa3 | 835 | } __attribute__ ((packed)) *secm_area; |
d53c51f2 | 836 | unsigned long flags; |
495a5b45 CH |
837 | int ret, ccode; |
838 | ||
d53c51f2 | 839 | spin_lock_irqsave(&chsc_page_lock, flags); |
34196f82 SO |
840 | memset(chsc_page, 0, PAGE_SIZE); |
841 | secm_area = chsc_page; | |
495a5b45 CH |
842 | secm_area->request.length = 0x0050; |
843 | secm_area->request.code = 0x0016; | |
844 | ||
d1bf8590 | 845 | secm_area->key = PAGE_DEFAULT_KEY >> 4; |
495a5b45 CH |
846 | secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1; |
847 | secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2; | |
848 | ||
849 | secm_area->operation_code = enable ? 0 : 1; | |
850 | ||
851 | ccode = chsc(secm_area); | |
34196f82 SO |
852 | if (ccode > 0) { |
853 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
854 | goto out; | |
855 | } | |
495a5b45 CH |
856 | |
857 | switch (secm_area->response.code) { | |
b9c9a21a CH |
858 | case 0x0102: |
859 | case 0x0103: | |
495a5b45 | 860 | ret = -EINVAL; |
17e7d87d | 861 | break; |
495a5b45 | 862 | default: |
b9c9a21a | 863 | ret = chsc_error_from_response(secm_area->response.code); |
495a5b45 | 864 | } |
b9c9a21a CH |
865 | if (ret != 0) |
866 | CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n", | |
867 | secm_area->response.code); | |
34196f82 | 868 | out: |
d53c51f2 | 869 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
495a5b45 CH |
870 | return ret; |
871 | } | |
872 | ||
873 | int | |
874 | chsc_secm(struct channel_subsystem *css, int enable) | |
875 | { | |
495a5b45 CH |
876 | int ret; |
877 | ||
495a5b45 CH |
878 | if (enable && !css->cm_enabled) { |
879 | css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
880 | css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
881 | if (!css->cub_addr1 || !css->cub_addr2) { | |
882 | free_page((unsigned long)css->cub_addr1); | |
883 | free_page((unsigned long)css->cub_addr2); | |
495a5b45 CH |
884 | return -ENOMEM; |
885 | } | |
886 | } | |
34196f82 | 887 | ret = __chsc_do_secm(css, enable); |
495a5b45 CH |
888 | if (!ret) { |
889 | css->cm_enabled = enable; | |
890 | if (css->cm_enabled) { | |
891 | ret = chsc_add_cmg_attr(css); | |
892 | if (ret) { | |
34196f82 | 893 | __chsc_do_secm(css, 0); |
495a5b45 CH |
894 | css->cm_enabled = 0; |
895 | } | |
896 | } else | |
897 | chsc_remove_cmg_attr(css); | |
898 | } | |
8c4941c5 | 899 | if (!css->cm_enabled) { |
495a5b45 CH |
900 | free_page((unsigned long)css->cub_addr1); |
901 | free_page((unsigned long)css->cub_addr2); | |
902 | } | |
495a5b45 CH |
903 | return ret; |
904 | } | |
905 | ||
9d92a7e1 | 906 | int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, |
906c9768 | 907 | int c, int m, void *page) |
1da177e4 | 908 | { |
906c9768 | 909 | struct chsc_scpd *scpd_area; |
1da177e4 LT |
910 | int ccode, ret; |
911 | ||
f9773768 SO |
912 | if ((rfmt == 1 || rfmt == 0) && c == 1 && |
913 | !css_general_characteristics.fcs) | |
9d92a7e1 CH |
914 | return -EINVAL; |
915 | if ((rfmt == 2) && !css_general_characteristics.cib) | |
916 | return -EINVAL; | |
1da177e4 | 917 | |
906c9768 SO |
918 | memset(page, 0, PAGE_SIZE); |
919 | scpd_area = page; | |
495a5b45 CH |
920 | scpd_area->request.length = 0x0010; |
921 | scpd_area->request.code = 0x0002; | |
9d92a7e1 | 922 | scpd_area->cssid = chpid.cssid; |
f86635fa PO |
923 | scpd_area->first_chpid = chpid.id; |
924 | scpd_area->last_chpid = chpid.id; | |
9d92a7e1 CH |
925 | scpd_area->m = m; |
926 | scpd_area->c = c; | |
927 | scpd_area->fmt = fmt; | |
928 | scpd_area->rfmt = rfmt; | |
1da177e4 LT |
929 | |
930 | ccode = chsc(scpd_area); | |
906c9768 SO |
931 | if (ccode > 0) |
932 | return (ccode == 3) ? -ENODEV : -EBUSY; | |
1da177e4 | 933 | |
b9c9a21a | 934 | ret = chsc_error_from_response(scpd_area->response.code); |
906c9768 | 935 | if (ret) |
b9c9a21a | 936 | CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n", |
1da177e4 | 937 | scpd_area->response.code); |
1da177e4 LT |
938 | return ret; |
939 | } | |
9d92a7e1 CH |
940 | EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc); |
941 | ||
942 | int chsc_determine_base_channel_path_desc(struct chp_id chpid, | |
943 | struct channel_path_desc *desc) | |
944 | { | |
906c9768 | 945 | struct chsc_scpd *scpd_area; |
62da177a | 946 | unsigned long flags; |
9d92a7e1 CH |
947 | int ret; |
948 | ||
62da177a | 949 | spin_lock_irqsave(&chsc_page_lock, flags); |
906c9768 SO |
950 | scpd_area = chsc_page; |
951 | ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, scpd_area); | |
9d92a7e1 | 952 | if (ret) |
906c9768 | 953 | goto out; |
687cb7f2 SO |
954 | |
955 | memcpy(desc, scpd_area->data, sizeof(*desc)); | |
906c9768 | 956 | out: |
62da177a | 957 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
9d92a7e1 CH |
958 | return ret; |
959 | } | |
1da177e4 | 960 | |
ce322ccd SO |
961 | int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid, |
962 | struct channel_path_desc_fmt1 *desc) | |
963 | { | |
ce322ccd | 964 | struct chsc_scpd *scpd_area; |
cce0eacc | 965 | unsigned long flags; |
ce322ccd SO |
966 | int ret; |
967 | ||
cce0eacc | 968 | spin_lock_irqsave(&chsc_page_lock, flags); |
ce322ccd | 969 | scpd_area = chsc_page; |
f9773768 | 970 | ret = chsc_determine_channel_path_desc(chpid, 0, 1, 1, 0, scpd_area); |
ce322ccd SO |
971 | if (ret) |
972 | goto out; | |
687cb7f2 SO |
973 | |
974 | memcpy(desc, scpd_area->data, sizeof(*desc)); | |
ce322ccd | 975 | out: |
cce0eacc | 976 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
ce322ccd SO |
977 | return ret; |
978 | } | |
979 | ||
495a5b45 CH |
980 | static void |
981 | chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, | |
982 | struct cmg_chars *chars) | |
983 | { | |
34196f82 SO |
984 | int i, mask; |
985 | ||
34196f82 SO |
986 | for (i = 0; i < NR_MEASUREMENT_CHARS; i++) { |
987 | mask = 0x80 >> (i + 3); | |
988 | if (cmcv & mask) | |
0d9bfe91 | 989 | chp->cmg_chars.values[i] = chars->values[i]; |
34196f82 | 990 | else |
0d9bfe91 | 991 | chp->cmg_chars.values[i] = 0; |
495a5b45 CH |
992 | } |
993 | } | |
994 | ||
e6b6e10a | 995 | int chsc_get_channel_measurement_chars(struct channel_path *chp) |
495a5b45 | 996 | { |
d53c51f2 | 997 | unsigned long flags; |
495a5b45 CH |
998 | int ccode, ret; |
999 | ||
1000 | struct { | |
1001 | struct chsc_header request; | |
1002 | u32 : 24; | |
1003 | u32 first_chpid : 8; | |
1004 | u32 : 24; | |
1005 | u32 last_chpid : 8; | |
1006 | u32 zeroes1; | |
1007 | struct chsc_header response; | |
1008 | u32 zeroes2; | |
1009 | u32 not_valid : 1; | |
1010 | u32 shared : 1; | |
1011 | u32 : 22; | |
1012 | u32 chpid : 8; | |
1013 | u32 cmcv : 5; | |
1014 | u32 : 11; | |
1015 | u32 cmgq : 8; | |
1016 | u32 cmg : 8; | |
1017 | u32 zeroes3; | |
1018 | u32 data[NR_MEASUREMENT_CHARS]; | |
0f008aa3 | 1019 | } __attribute__ ((packed)) *scmc_area; |
495a5b45 | 1020 | |
61f0bfcf SO |
1021 | chp->shared = -1; |
1022 | chp->cmg = -1; | |
1023 | ||
1024 | if (!css_chsc_characteristics.scmc || !css_chsc_characteristics.secm) | |
0b601373 | 1025 | return -EINVAL; |
61f0bfcf | 1026 | |
d53c51f2 | 1027 | spin_lock_irqsave(&chsc_page_lock, flags); |
34196f82 SO |
1028 | memset(chsc_page, 0, PAGE_SIZE); |
1029 | scmc_area = chsc_page; | |
495a5b45 CH |
1030 | scmc_area->request.length = 0x0010; |
1031 | scmc_area->request.code = 0x0022; | |
f86635fa PO |
1032 | scmc_area->first_chpid = chp->chpid.id; |
1033 | scmc_area->last_chpid = chp->chpid.id; | |
495a5b45 CH |
1034 | |
1035 | ccode = chsc(scmc_area); | |
1036 | if (ccode > 0) { | |
1037 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
1038 | goto out; | |
1039 | } | |
1040 | ||
b9c9a21a | 1041 | ret = chsc_error_from_response(scmc_area->response.code); |
34196f82 | 1042 | if (ret) { |
b9c9a21a | 1043 | CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n", |
495a5b45 | 1044 | scmc_area->response.code); |
34196f82 SO |
1045 | goto out; |
1046 | } | |
61f0bfcf | 1047 | if (scmc_area->not_valid) |
34196f82 | 1048 | goto out; |
61f0bfcf | 1049 | |
34196f82 SO |
1050 | chp->cmg = scmc_area->cmg; |
1051 | chp->shared = scmc_area->shared; | |
1052 | if (chp->cmg != 2 && chp->cmg != 3) { | |
1053 | /* No cmg-dependent data. */ | |
1054 | goto out; | |
495a5b45 | 1055 | } |
34196f82 SO |
1056 | chsc_initialize_cmg_chars(chp, scmc_area->cmcv, |
1057 | (struct cmg_chars *) &scmc_area->data); | |
495a5b45 | 1058 | out: |
d53c51f2 | 1059 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
495a5b45 CH |
1060 | return ret; |
1061 | } | |
1062 | ||
34aec07c | 1063 | int __init chsc_init(void) |
1da177e4 | 1064 | { |
c1156189 CH |
1065 | int ret; |
1066 | ||
1da177e4 | 1067 | sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
34196f82 SO |
1068 | chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
1069 | if (!sei_page || !chsc_page) { | |
1070 | ret = -ENOMEM; | |
1071 | goto out_err; | |
c1156189 | 1072 | } |
f5daba1d | 1073 | ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw); |
c1156189 | 1074 | if (ret) |
34196f82 SO |
1075 | goto out_err; |
1076 | return ret; | |
1077 | out_err: | |
1078 | free_page((unsigned long)chsc_page); | |
1079 | free_page((unsigned long)sei_page); | |
c1156189 | 1080 | return ret; |
1da177e4 LT |
1081 | } |
1082 | ||
34aec07c | 1083 | void __init chsc_init_cleanup(void) |
4434a38c | 1084 | { |
f5daba1d | 1085 | crw_unregister_handler(CRW_RSC_CSS); |
34196f82 | 1086 | free_page((unsigned long)chsc_page); |
34aec07c | 1087 | free_page((unsigned long)sei_page); |
4434a38c CH |
1088 | } |
1089 | ||
18e22a17 | 1090 | int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code) |
fb6958a5 CH |
1091 | { |
1092 | int ret; | |
fb6958a5 | 1093 | |
34196f82 SO |
1094 | sda_area->request.length = 0x0400; |
1095 | sda_area->request.code = 0x0031; | |
1096 | sda_area->operation_code = operation_code; | |
fb6958a5 | 1097 | |
34196f82 | 1098 | ret = chsc(sda_area); |
fb6958a5 CH |
1099 | if (ret > 0) { |
1100 | ret = (ret == 3) ? -ENODEV : -EBUSY; | |
1101 | goto out; | |
1102 | } | |
b9c9a21a | 1103 | |
34196f82 | 1104 | switch (sda_area->response.code) { |
b9c9a21a | 1105 | case 0x0101: |
fb6958a5 CH |
1106 | ret = -EOPNOTSUPP; |
1107 | break; | |
b9c9a21a | 1108 | default: |
34196f82 | 1109 | ret = chsc_error_from_response(sda_area->response.code); |
fb6958a5 | 1110 | } |
18e22a17 SO |
1111 | out: |
1112 | return ret; | |
1113 | } | |
1114 | ||
1115 | int chsc_enable_facility(int operation_code) | |
1116 | { | |
1117 | struct chsc_sda_area *sda_area; | |
1118 | unsigned long flags; | |
1119 | int ret; | |
1120 | ||
1121 | spin_lock_irqsave(&chsc_page_lock, flags); | |
1122 | memset(chsc_page, 0, PAGE_SIZE); | |
1123 | sda_area = chsc_page; | |
1124 | ||
1125 | ret = __chsc_enable_facility(sda_area, operation_code); | |
b9c9a21a CH |
1126 | if (ret != 0) |
1127 | CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n", | |
34196f82 | 1128 | operation_code, sda_area->response.code); |
18e22a17 | 1129 | |
34196f82 | 1130 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
fb6958a5 CH |
1131 | return ret; |
1132 | } | |
1133 | ||
1da177e4 LT |
1134 | struct css_general_char css_general_characteristics; |
1135 | struct css_chsc_char css_chsc_characteristics; | |
1136 | ||
1137 | int __init | |
1138 | chsc_determine_css_characteristics(void) | |
1139 | { | |
d53c51f2 | 1140 | unsigned long flags; |
1da177e4 LT |
1141 | int result; |
1142 | struct { | |
1143 | struct chsc_header request; | |
1144 | u32 reserved1; | |
1145 | u32 reserved2; | |
1146 | u32 reserved3; | |
1147 | struct chsc_header response; | |
1148 | u32 reserved4; | |
1149 | u32 general_char[510]; | |
34aec07c | 1150 | u32 chsc_char[508]; |
0f008aa3 | 1151 | } __attribute__ ((packed)) *scsc_area; |
1da177e4 | 1152 | |
d53c51f2 | 1153 | spin_lock_irqsave(&chsc_page_lock, flags); |
34196f82 SO |
1154 | memset(chsc_page, 0, PAGE_SIZE); |
1155 | scsc_area = chsc_page; | |
495a5b45 CH |
1156 | scsc_area->request.length = 0x0010; |
1157 | scsc_area->request.code = 0x0010; | |
1da177e4 LT |
1158 | |
1159 | result = chsc(scsc_area); | |
1160 | if (result) { | |
b9c9a21a | 1161 | result = (result == 3) ? -ENODEV : -EBUSY; |
1da177e4 LT |
1162 | goto exit; |
1163 | } | |
1164 | ||
b9c9a21a CH |
1165 | result = chsc_error_from_response(scsc_area->response.code); |
1166 | if (result == 0) { | |
1167 | memcpy(&css_general_characteristics, scsc_area->general_char, | |
1168 | sizeof(css_general_characteristics)); | |
1169 | memcpy(&css_chsc_characteristics, scsc_area->chsc_char, | |
1170 | sizeof(css_chsc_characteristics)); | |
1171 | } else | |
1172 | CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n", | |
1173 | scsc_area->response.code); | |
1da177e4 | 1174 | exit: |
d53c51f2 | 1175 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
1da177e4 LT |
1176 | return result; |
1177 | } | |
1178 | ||
1179 | EXPORT_SYMBOL_GPL(css_general_characteristics); | |
1180 | EXPORT_SYMBOL_GPL(css_chsc_characteristics); | |
d2fec595 | 1181 | |
2f82f577 | 1182 | int chsc_sstpc(void *page, unsigned int op, u16 ctrl, u64 *clock_delta) |
d2fec595 MS |
1183 | { |
1184 | struct { | |
1185 | struct chsc_header request; | |
1186 | unsigned int rsvd0; | |
1187 | unsigned int op : 8; | |
1188 | unsigned int rsvd1 : 8; | |
1189 | unsigned int ctrl : 16; | |
1190 | unsigned int rsvd2[5]; | |
1191 | struct chsc_header response; | |
2f82f577 MS |
1192 | unsigned int rsvd3[3]; |
1193 | u64 clock_delta; | |
1194 | unsigned int rsvd4[2]; | |
d2fec595 MS |
1195 | } __attribute__ ((packed)) *rr; |
1196 | int rc; | |
1197 | ||
1198 | memset(page, 0, PAGE_SIZE); | |
1199 | rr = page; | |
1200 | rr->request.length = 0x0020; | |
1201 | rr->request.code = 0x0033; | |
1202 | rr->op = op; | |
1203 | rr->ctrl = ctrl; | |
1204 | rc = chsc(rr); | |
1205 | if (rc) | |
1206 | return -EIO; | |
1207 | rc = (rr->response.code == 0x0001) ? 0 : -EIO; | |
2f82f577 MS |
1208 | if (clock_delta) |
1209 | *clock_delta = rr->clock_delta; | |
d2fec595 MS |
1210 | return rc; |
1211 | } | |
1212 | ||
1213 | int chsc_sstpi(void *page, void *result, size_t size) | |
1214 | { | |
1215 | struct { | |
1216 | struct chsc_header request; | |
1217 | unsigned int rsvd0[3]; | |
1218 | struct chsc_header response; | |
1219 | char data[size]; | |
1220 | } __attribute__ ((packed)) *rr; | |
1221 | int rc; | |
1222 | ||
1223 | memset(page, 0, PAGE_SIZE); | |
1224 | rr = page; | |
1225 | rr->request.length = 0x0010; | |
1226 | rr->request.code = 0x0038; | |
1227 | rc = chsc(rr); | |
1228 | if (rc) | |
1229 | return -EIO; | |
1230 | memcpy(result, &rr->data, size); | |
1231 | return (rr->response.code == 0x0001) ? 0 : -EIO; | |
1232 | } | |
1233 | ||
fd0457a6 ME |
1234 | int chsc_siosl(struct subchannel_id schid) |
1235 | { | |
34196f82 SO |
1236 | struct { |
1237 | struct chsc_header request; | |
1238 | u32 word1; | |
1239 | struct subchannel_id sid; | |
1240 | u32 word3; | |
1241 | struct chsc_header response; | |
1242 | u32 word[11]; | |
1243 | } __attribute__ ((packed)) *siosl_area; | |
fd0457a6 ME |
1244 | unsigned long flags; |
1245 | int ccode; | |
1246 | int rc; | |
1247 | ||
34196f82 SO |
1248 | spin_lock_irqsave(&chsc_page_lock, flags); |
1249 | memset(chsc_page, 0, PAGE_SIZE); | |
1250 | siosl_area = chsc_page; | |
1251 | siosl_area->request.length = 0x0010; | |
1252 | siosl_area->request.code = 0x0046; | |
1253 | siosl_area->word1 = 0x80000000; | |
1254 | siosl_area->sid = schid; | |
fd0457a6 | 1255 | |
34196f82 | 1256 | ccode = chsc(siosl_area); |
fd0457a6 ME |
1257 | if (ccode > 0) { |
1258 | if (ccode == 3) | |
1259 | rc = -ENODEV; | |
1260 | else | |
1261 | rc = -EBUSY; | |
1262 | CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n", | |
1263 | schid.ssid, schid.sch_no, ccode); | |
1264 | goto out; | |
1265 | } | |
34196f82 | 1266 | rc = chsc_error_from_response(siosl_area->response.code); |
fd0457a6 ME |
1267 | if (rc) |
1268 | CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n", | |
1269 | schid.ssid, schid.sch_no, | |
34196f82 | 1270 | siosl_area->response.code); |
fd0457a6 ME |
1271 | else |
1272 | CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n", | |
1273 | schid.ssid, schid.sch_no); | |
1274 | out: | |
34196f82 | 1275 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
fd0457a6 ME |
1276 | return rc; |
1277 | } | |
1278 | EXPORT_SYMBOL_GPL(chsc_siosl); | |
184b08af SO |
1279 | |
1280 | /** | |
1281 | * chsc_scm_info() - store SCM information (SSI) | |
1282 | * @scm_area: request and response block for SSI | |
1283 | * @token: continuation token | |
1284 | * | |
1285 | * Returns 0 on success. | |
1286 | */ | |
1287 | int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token) | |
1288 | { | |
1289 | int ccode, ret; | |
1290 | ||
1291 | memset(scm_area, 0, sizeof(*scm_area)); | |
1292 | scm_area->request.length = 0x0020; | |
1293 | scm_area->request.code = 0x004C; | |
1294 | scm_area->reqtok = token; | |
1295 | ||
1296 | ccode = chsc(scm_area); | |
1297 | if (ccode > 0) { | |
1298 | ret = (ccode == 3) ? -ENODEV : -EBUSY; | |
1299 | goto out; | |
1300 | } | |
1301 | ret = chsc_error_from_response(scm_area->response.code); | |
1302 | if (ret != 0) | |
1303 | CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n", | |
1304 | scm_area->response.code); | |
1305 | out: | |
1306 | return ret; | |
1307 | } | |
1308 | EXPORT_SYMBOL_GPL(chsc_scm_info); | |
1c59a861 EC |
1309 | |
1310 | /** | |
1311 | * chsc_pnso_brinfo() - Perform Network-Subchannel Operation, Bridge Info. | |
1312 | * @schid: id of the subchannel on which PNSO is performed | |
1313 | * @brinfo_area: request and response block for the operation | |
1314 | * @resume_token: resume token for multiblock response | |
1315 | * @cnc: Boolean change-notification control | |
1316 | * | |
1317 | * brinfo_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL) | |
1318 | * | |
1319 | * Returns 0 on success. | |
1320 | */ | |
1321 | int chsc_pnso_brinfo(struct subchannel_id schid, | |
1322 | struct chsc_pnso_area *brinfo_area, | |
1323 | struct chsc_brinfo_resume_token resume_token, | |
1324 | int cnc) | |
1325 | { | |
1326 | memset(brinfo_area, 0, sizeof(*brinfo_area)); | |
1327 | brinfo_area->request.length = 0x0030; | |
1328 | brinfo_area->request.code = 0x003d; /* network-subchannel operation */ | |
1329 | brinfo_area->m = schid.m; | |
1330 | brinfo_area->ssid = schid.ssid; | |
1331 | brinfo_area->sch = schid.sch_no; | |
1332 | brinfo_area->cssid = schid.cssid; | |
1333 | brinfo_area->oc = 0; /* Store-network-bridging-information list */ | |
1334 | brinfo_area->resume_token = resume_token; | |
1335 | brinfo_area->n = (cnc != 0); | |
1336 | if (chsc(brinfo_area)) | |
1337 | return -EIO; | |
1338 | return chsc_error_from_response(brinfo_area->response.code); | |
1339 | } | |
1340 | EXPORT_SYMBOL_GPL(chsc_pnso_brinfo); |